Hungry birds in the rain

I could NOT take my eyes off the bird activity in the backyard during the recent heavy rains—mostly a few dozen robins (& others) enthusiastically devouring berries from what might be a Sambucus or Elder (the smooth leaf margins are confusing my efforts to id it). Of course, robins are known for sometimes foraging en masse like this. This day, it was in the middle of the heaviest downpour.